Transmission-gearing for milling-machines.



F. A-.; ;#A-Rs0Ns-. TRANSMISSION GEARFNGfOR MILLING MACHINES.

APPLICATION FILED JULY 3!. 19'6.

Patented July 17, 1917.

3 SHETS-SHET I.

F. A. PARSONS, TRANSMISSION GEARING FOR MILLING MACHINES.

APPLICATION FILED JULY 31,1916.

PzgtentedJulylY, 191T. '3 SHEETS-SHEET 2.

F. A. PARSONS.

TRANSMISSION GEARING FOR MILLING MACHINES.

APPLICATION FILED JULY 31.1916- 4 1 9 1 7H 1 Yu 1 H J d e u n e t a D1 3SHEETS-SHEET 3.

45 Fig earn FRED A. PARSONS, OF MILWAUKEE. WISCONSIN, ASSIGNOR TO THEKEMPSMITH MANU- FACTURING CO., OF WEST ALLIS, WISCONSIN, A CORPORATIONOF WISCONSIN.

TRANSMISSION-GEARING FOR MILLING-MACHINES.

Specification of Letters Patent.

Patented July 17, 1191?.

Application filed July 31, 1916. Serial No. 112,208. i

T all whom it may concern:

Be it known that'I, FRED A. PARSONS, a

citizen of the United States, residing at Milwaukee, in the county ofMilwaukee and State-of Wisconsin, have invented certain new and usefulImprovements in Transmission-Gearing for Milling-Machines, of which thefollowing is a specification, reference being bad to the accompanyingdrawing, forming" a part thereof.

obtain a maximum number of speed variations with a. minimum number of,gears; to -obtain such speed variations without the use of clutches,thereby avoiding the noise of intermeshing gears running idly,

and without the use of tumblers, thereby avoidingthe difficulty ofholding the tum- .blers rigidly in working position and the vibrationincident to their use; to provide an arrangement whereby a minimumnumber of gears are engagedfor any given speed andyno more are engagedfor low speedsthan high speeds, thus tending to secure equally highefficiency for all speeds; and generally to simpllfy and improve theconstruction and operation of speed changing mechanism of this class.

It consists in the, constructlon, arrangement and combination of partsas hereinafter particularly described and pointed out in the claims.

In the accompanying drawing like charactersdesignate the same parts inthe several figures.

Figurel is a front elevation of a milling machine embodying theinvention; Fig. 2

isanenlarged vertical section of the upper part thereof on the brokenline- 2-2-, Fig. 3; and Fig. 3 is a developed section gen erallyindicated by the broken line 3-3, 2, of the train of gearing for drivingthe spindle at different speeds. I

-The machine comprises a box frame or hollow column 1', similar ingeneral construction to those employed in machines of this asstk iIt' isprovided on one side with a w schsew2f-which opens into the interiorthereof and forms therewith a. housing for the-variable speed train ofgearing which drives the spindle. In the upper part of the column anoverarm 3 is mounted, and

below and parallel therewith, the tool spindle -l. A driving shaft 5 ismounted parallel with the spindle in the gear case 2,

and parallel therewith a first intermediate shaft 6 is mountedinbearings which may be formed as shown, with said gear case. Below andparallel with the spindle 4, a sec; ond intermediate shaft 7 is mountedin the column 1. The spindle t is provided with a cone or series ofgears 8 and 9 fixed thereon. An axially stationary cone or series ofconnected gears 10, 11 and 12, is

revolubly mounted on the first intermediate shaft 6. A cone or series ofconnected gears 13, it and 15 is feathered or otherwise mounted .on thedriving shaft 5, so as to rotate therewith, and be axially shiftableinto engagementone at a time with the gears on the shaft 6. A first coneorseries of connected gears 16, 17 and 18, is feathered or otherwisemounted on the second inter-- mediate shaft T, so as to rotate therewithand be shiftable axially into engagement one at a time with the gears onthe shaft (3.- A second cone or series of connected gears 1.9 and 20, isalso feathered or otherwise mounted on the shaft 7 so as to rotatetherewith and be axially shiftable into engagement one at a time withthe gears on .the spindle l. \Vith these four shafts, including the toolspindle, and thirteen gears, the

spindle may be driven at eighteen different speeds from a power shaft orprime mover having a constant speed. i i

As shown in Fig. 3, the power shaft 21- with which a prime movers'uch asan electric motor may be directly or indirectly connected. is mounted ina case or housing. 220, in alinement with the driving shaft-"5 of theprimary gear train through which, the spindle is rotated. The shaft 21is provided with a fixed bevel gear 22, meshing with a similar gear 23on the upper end of a ver-- tical shaft 24. The gear 23 meshes with asimilar gear 25, loosely mounted onthe shaft 5. A clutch collar v26,feathered or otherwise mounted on the shaft 5 so as to turn therewith,but be movable lengthwise bers on the hubs of thegears 22' and 25, af-

fordsmeansfor connecting the shaft I 21, is adapted by engagement with alever position. The hub of the lever 35, whi'ch'is with a In the presentcase a belt pulley 27, representing the prime mover, is rotatablymounted on the bearing in which the shaft 21 is supported, and isoperatively connected; with said shaft by a'friction clutch comprisingan expansible band or-shoe 28, carried within a friction rim 29 on thepulley by a spider 30, which isfixed on the shaft 21. An internallybeveled collar or ring 31, mounted and axially shiftable on the shaft 32fulcrumed on the spider 30, to expand the band or-shoe 28 within the rim29 when said collar or ring is shifted to the left. The collar or ring31 is connected by a rod 33,, passing loosely and axially through-theshafts 21 and-5, with aforked arm 34 of a lever 35, pivotally mounted onthe gear case 2 within easy reach of the operator.

As shown in Fig. 3, a spring actuated V- shaped detent or plunger 36,mounted in the gear case 2, by engagement with a shaped lug on the'hubof the arm 34,.tends tothrow-said arm to and-hold it in either of itsextreme positions when the lever 35' is shifted in either direction pastits central keyed or feathered and shiftable axially on the Verticalshaft 38 connecting it with the. arm 34, is-formed with teeth, which. byengagement with .a correspondingly toothed collar fixed on the shaft 38,enablesithe lever to be adjusted to different'angular relations to saidshaft most convenient for its manip=-. ulation by the operator standingin' different positions.

' The first and. second cones. or series of gears on the intermediateshafts "7, are shifted and lockedin place thereon by cranks '39 and 40,pivotally mounted on the front,

wall of the gearcase2, as shown-in Fig. 1.

The shafts 41. ofthese cranks, passing"horizontally through and having,bearings .-in the gear case, are provided at" their inner ends withpinions 43, which inesh" on their uppersides with racks 44, mounted andguidedon a fixed rod,45,'extending through and fixed at its ends to thecolumn :1, parallel with the shaft 7. Qneaof these-racks is providedwith'a forlred arm- 16, which engages groove in the sleeve or hub of thegears 16, 1-7 and 18, as shown in Fig. The

- other-rack 1 1, is formed or provide'dlwith arm -17,which engages witha groove in the sleeve or hub of the gears 19 and 20, as

shown in Fig. 3.

The cone or series of connected gears 13.

11 and 15, on the driving shaft 5, is shifted and locked 111 differentpositlons by a crank 48, also mounted on the front wall of the gear case2, and connected by a short horizontal shaft passing through and havinga bearing in said case with a' pinion -19, meshing on its under sideswith a rack 50, guided on a rod 51, fixed at its ends in said caseparallel with the shaft5. The rack 50 is formed-or provided with aforked arm 52, engaging a groove in the sleeve or hub. of the gears 1.3,14 and 15, as shown in Fig. The handles, 53 of the several cranks arem-ovably connected therewith and are provided in the usual manner withspring actuated locking pins (not shown) which by engagement withsockets 54, provided therefor in the gear case 2, hold thev shiftablecones ort series of gears in their different positions.

-By the construction and arrangement of the gears and shafts of theprimary train for-driving the spindle 4 and -the connecmind of theoperator'and consequent mis takes and accidents. A Work table 55,mounted and movable horizontally indirections transverse to each otheron aIknee 56,'which is guided and movable vertically. on the column 1,as usual in machines of this class, is connected with the powershaft' 21or prime'mo'ver, by secondary. trains of gearing comprisingextensible-jointed shafts 57, and gears inclosed in a box or case 58attached to thecolumn 1 i below the gear case '2; "One of these sec-,ondary trains,

comprising the upper shaft 57, is a'variable'slow speed. drive, and isconnected with theipower shaft 21. through the bevel gears-2.2 'f "1nd'23-and' the vertical shafts-24.: The'othersecondary train,coniprisingthe lower shaft 57, is a non-variable high sgeed fdrive forquickly shifting the table from one position to another, and

is connected with the powershaft 21 by a grooved rim.59 on.ti1e pulley27, a belt 60 and a grooved'pulleyafil, as shown in Figs. 1 and 3.

.By this arrangement of the primary and secondary. trains of gearingwith rotation to one another and to the prime mover or power shaft 21,the bevel gear h'rriugh which the low speed feed drive a) L.

55 is connected with'the power shaft 21, also serves to reverslblyconnect the driving shaft gears of said train in connection with specialprovision therefor in the structure of the column, which is provided, asshown in Fig. 2, with a transverse partition 62, forming an'oilreceptacle into which the lower sides of the gears on the lower.intermediate shaft 7 are adapted to dip. This oil receptacle is filledto the desired level, as indicated in Fig. :2, by means of anelbowshaped funnel or tube 63, provided with a removable cap orclosure64. No claim however, is made herein "to the means shown for lubricatingthe gearing, as this is made the machine may be made withoutdeparturefrom the principle and scope of the invention as defined in thefollowing claims.

I claim:

1. In transmission gearing for milling machines the combination of aspindle, a driving shaft, first and second intermediate shafts parallelwith the spindle and driving shaft, an axially stationary cone of gearson the first intermediate shaft, a cone of gears axially shiftable onthe driving shaft into engagement one at a time with the gears on thefirst intermediate shaft,1an axially stationary cone of gears on thespindle, a first cone of gears axially shiftable on the secondintermediate shaft into engagement one at a time with the gears on thefirst intermediate shaft. and a second cone of gears axially shiftableon the second in-- termediate shaft into engagement one at atime withthe gears on the spindle.

2. In transmission gearing for milling machines the combination of aspindle, a driving shaft, first and second intermediate shafts parallelwith the spindle and driving shaft, an axially stationary cone of gearson the first intermediate shaft, a cone of gears axially shiftable onthe driving shaft into engagement one at atime with the gears on thefirst intermediate shaft, an axially stationary cone of gears on thespindlea first cone of gears axially shiftable on the sec andintermediate shaft into engagement one at a time with the gears on thefirst intermediate shaft, a second cone of gears axially shiftable onthe second intermediate shaft into engagement one at a time with thegears on the splndle, the larger gears of the first andsecond cones onthe second'intermediate shaft being located at opposite ends of theconesand the larger gears of the cones on the spindle and driving shaftbeing located at corresponding ends thereof, and means for adjusting theaxially shiftable cones independently of one another movable in the.same direction for. increasing the speed and in' the opposite directionfor reducing the speed of the spindle. V

3. In transmission gearing for 'milling 'machines' the combination of aspindle. a

driving shaft, first and second intermediate shafts parallel with thespindle and drivmg shaft,-an ax1ally stationary cone of gears on thefirst intermediate shaft, a cone of gears axially shiftable on thedriving shaft into engagement one at a time with the gears on the firstintermediate shaft, an axially stationary cone of gears on the spindle,a first cone of gears axially shiftable on the second intermediate shaftinto engagement one at a time with the gears on'the first intermediateshaft. a second cone of gears axially shiftable on the secondintermediate shaft into engagement one at a time with the gears on thespindle, and mean movable in the same direction for shifting the seve'al cones of gears independently of one another to increase the speedand'in the reversedirection to reduce the speed of the spindle.

at. In a transmission gearing for milling machines the combination of aspindle. a driving shaft, first and second intermediate shafts paralleltherewith, an axially stationary cone of gears on the spindle. an

axially stationary cone of gears on the first intermediate shaft, a coneof gears axially shiftable on the driving shaft into engagement one at atime .with the gears on the first intermediate shaft, a first cone ofgears axially shiftabl'e on the second intermediate shaft intoengagement one at-a time with thegears on'the first intermediate shaft.-a second cone of gears axially shif'tabl on the second intermediateshaft into engage- I .axially stationary cone of gears on the firstintermediate shaft, a cone of gears axially shiftable on the drivingshaft into engagement one at a time with the gears on the firstintermediate shaft, a first eone of gears axially shiftable on thesecond intermediate shaft into engagement one at a time with'thegears onthe first intermediate shaft. :1 second cone of gears axially shiftableon the second intermediate shaft Limo engagement one at a 'time with thegears on the spindle, 'thela'rger gears of the genes on the secondintermediate shaft bemg attopposite ends of the cones, racks connestedwith the shiftable cones and parallel with their shafts, and cranks prowith pmlons meshing with said'yracks, -tlie pin- 1011.13 0ndintermediate shaft being located on the same side of their racks and thepinion associated-with the cone on'the'driving shaft being located onthe opposite side of its rack v 6. In transmission gearing for millingmachines the combmation'iflwlth hollow column, of a tool spindle havingbearings shaft,- a'sec ond-cone of gearsaxially shiftable 'on-the secondintermediate-shaft into engagement one kat'a timewith the gears on'thespindlefa power shaft axially alined with-the driving shaft and providedwith affixed bevel gear, a bevelgear loosely.

molinted on the driving shaft, an intermediate bevel gear having itsaxls at rlght angles tothe driving shaft and meshing.

with the bevel gears on the power and driving shafts, and a clutchadapted to connect the driving and power shafts directly wlth each otheror indirectly'and reversibly through said: bevel gears.

7.111 transmission gearing for millingassociated with the cones on-. thesec-' machines the combination with a hollow column, of a toolspindlehaving bearing: in the upper part of the column, a train of gearinginclosed and having hearings in said column and comprising a drivingshaft and first and second intermediate shafts parallel with. thespindle, a cone of axially stationary vgears on the spindle, a cone ofaxially stationary gears on the first intermediate shaft, a cone ofgears axially shiftable on the driving shaft into engagement one at atime with the gears on the first intermediate shaft, a first cone ofgears axially shiftalole on the second intermediate shaft intoengagement one at a time with the gears on the first intermediate shaft,a second cone of gears axially shiftable on the second intermediateshaft into engagement one at a time with the gears on the spindle, apower shaft axially alined with the driving shaft and provided with afixed bevel gear, a bevel gearloosely mounted on the driving shaft, anintermediate bevel gear having its axis at right angles to the drivingshaft and meshing with the bevel gears on the power and driving shafts,a' clutch adapted to connect the driving and power shafts directly witheach other or indirectly and reversibly through said bevel gears, aprime mover, a clutch for connect-.

mg the prlme mover with the power shaft, and a lever for operating saidclutch connected therewith by a rod passing axially through thedrivingand power shafts.

In witness whereof I hereto afiix my signature in presence of twowitnesses.

FRED A. PARSONS.

Witnesses:

CHAS. L. Goss, Amen E. Goes.

